點擊按鈕，自動瀏覽文件

方法1：label與for進行綁定實現文字點擊選擇按鈕功能

<style>
    label{
    cursor:pointer;
}
.fileSpan{
    cursor:pointer;
    margin-left:22pt;
}

.fileSpan input {
  display:none;
}
.fileSpan .button {
  background: #0C8CC4;
  color: #fff;
  font-size: 12px;
  margin-right: 5px;
  padding: 7px 20px;
}
</style>

<span class="fileSpan">
    <label for="photo"><span class="button">CHOOSE A FILE</span></label>
        
  <input type="file" name="photo" id="photo" />
  
</span>

 

方法2：通過JS實現

<div>
    <input type="file"  style="display:none" onchange="Upload()" id="FileUpload"/><input  type="button" value="FileUpload" onclick=" OpenFile()" class="btn btn-info"/>
</div>

<script>
function OpenFile() {
        document.getElementById('FileUpload').click();
    }

</script>